Having had the error of my peevologist tendencies shown to me recently, I must frame this question carefully: Does "digit" still have anything to do with fingers and toes? How did it come to mean computers, photographs, etc? I can't help it; when I hear the term, "digital photography, I think of photographs of someone's fingers and toes.

Does "digit" still have anything to do with fingers and toes?

This meaning still ties with the one for 'a number symbol', e.g., in the Arabic numbering system (base-10), the digits are 0 – 9; in hexadecimal (base-16) 0 – F. In Latin the primary meaning of digitus was 'finger', and that was extended to 'toe'. An alternative meaning was a unit of measurement, roughly a Roman inch, ca.3/4", 16 to the foot (pes). Concerning its adjectival form, digital started out meaning values stored on some recording medium as discrete numbers. Then there's digitalis 'foxglove' (cf. German Fingerhut, literally, 'finger' + 'hat'), whence the medicine.

As for your peeving ways, Geoff, I wouldn't worry about it. We, all of us, peeve from time to time. My pet peeve is peevologists.

That reminds me of one of my favorite words, prestidigitator, which we've discussed here before.

[BTW, in rereading that old thread, I see that I used to like etymology.com. I don't anymore because I feel that they just copy from the OED.]